text: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef CONTENT_CHILD_BROWSER_FONT_RESOURCE_TRUSTED_H_
  #define CONTENT_CHILD_BROWSER_FONT_RESOURCE_TRUSTED_H_
  
  #include <string>
  
  #include "base/macros.h"
  #include "base/memory/scoped_ptr.h"
  #include "ppapi/c/pp_bool.h"
  #include "ppapi/c/pp_instance.h"
  #include "ppapi/c/pp_resource.h"
  #include "ppapi/c/pp_stdint.h"
  #include "ppapi/proxy/plugin_resource.h"
  #include "ppapi/shared_impl/ppapi_preferences.h"
  #include "ppapi/thunk/ppb_browser_font_trusted_api.h"
  
  class SkCanvas;
  
  namespace blink {
  class WebFont;
  }
  
  namespace content {
  
  class BrowserFontResource_Trusted
      : public ppapi::proxy::PluginResource,
        public ppapi::thunk::PPB_BrowserFont_Trusted_API {
   public:
    BrowserFontResource_Trusted(ppapi::proxy::Connection connection,
                                PP_Instance instance,
                                const PP_BrowserFont_Trusted_Description& desc,
                                const ppapi::Preferences& prefs);
  
    // Validates the parameters in thee description. Can be called on any thread.
    static bool IsPPFontDescriptionValid(
        const PP_BrowserFont_Trusted_Description& desc);
  
    // Resource override.
    ::ppapi::thunk::PPB_BrowserFont_Trusted_API* AsPPB_BrowserFont_Trusted_API()
        override;
  
    // PPB_BrowserFont_Trusted_API implementation.
    PP_Bool Describe(PP_BrowserFont_Trusted_Description* description,
                     PP_BrowserFont_Trusted_Metrics* metrics) override;
    PP_Bool DrawTextAt(PP_Resource image_data,
                       const PP_BrowserFont_Trusted_TextRun* text,
                       const PP_Point* position,
                       uint32_t color,
                       const PP_Rect* clip,
                       PP_Bool image_data_is_opaque) override;
    int32_t MeasureText(const PP_BrowserFont_Trusted_TextRun* text) override;
    uint32_t CharacterOffsetForPixel(const PP_BrowserFont_Trusted_TextRun* text,
                                     int32_t pixel_position) override;
    int32_t PixelOffsetForCharacter(const PP_BrowserFont_Trusted_TextRun* text,
                                    uint32_t char_offset) override;
  
   private:
    ~BrowserFontResource_Trusted() override;
  
    // Internal version of DrawTextAt that takes a mapped PlatformCanvas.
    void DrawTextToCanvas(SkCanvas* destination,
                          const PP_BrowserFont_Trusted_TextRun& text,
                          const PP_Point* position,
                          uint32_t color,
                          const PP_Rect* clip);
  
   private:
    scoped_ptr<blink::WebFont> font_;
  
    DISALLOW_COPY_AND_ASSIGN(BrowserFontResource_Trusted);
  };
  
  }  // namespace content
  
  #endif  // CONTENT_CHILD_BROWSER_FONT_RESOURCE_TRUSTED_H_
  